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Finding the Fourth Proportional to 110,815.20, 152,917.20 and 65,491.20

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Solution

The fourth proportional to 110,815.20, 152,917.20 and 65,491.20 is: 90,373.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,815.20 : 152,917.20 = 65,491.20 : x
  2. Step 2: Convert to fraction form
    110,815.20/152,917.20 = 65,491.20/x
  3. Step 3: Cross multiply
    110,815.20x = 152,917.20 × 65,491.20
  4. Step 4: Simplify right side
    110,815.20x = 10,014,730,928.64
  5. Step 5: Solve for x
    x = 10,014,730,928.64/110,815.20
  6. Step 6: Final answer
    x = 90,373.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.